Type-writing machine.



v A. G. F.'KUROWSKI {TYPE WRITING MACHINE. APPLICATION rum) APB..13,1910.

978,902. 1 Patented Dec. 20, 1910.

UNITED STATES PATENT-OFFICE.

ALFRED G. F. KU'ROWSKI, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPE-WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent; Patented Dec. 20, 191().

Application filed A pril l3, 1910. Serial'No. 555,274. i

To all whom it may concern: v

Be it known that I, ALFRED G. F. KURow- SKI, a citizen of the UnitedStates, residing in borough of Brooklyn, city of New York, in the countyof Kings and State of New York, have invented certain new and usefulImprovements in Type-Vriting Machines, of which the following is aspecification.

This invention relates to paper-feeding devices for typewrit-ingmachines, and particularly to the rod extending lengthwise of the usualtypewriting carriage to carry paperfeeding rolls which run upon theplaten.

The main object of the invention is to prevent springing of the rod, andthe consequent liability of displacement or loss of pressure andelticiency of/the rolls carried thereby. c l v i I provide the carriagewith an arm having a bearing engaging thepressure rollcarrying rod at a.point about midway of its ends, whereby to support the rod and preventfiexure thereof; and I provide for moving said arm to a position ofdisuse where it will be out of the way when not required, the arm beingpreferably fold-able against the front bar of the paper carriage.

In the accompanying drawings, Figure l is a plan showing the inventionapplied to an Underwood writing machine. Fig. 2 is a perspective view ofthe arm removed from the machine, showing it engaged with theroll-carrying rod. Fig. 3 is a detail side view, partly in section,showing the arm swung to operative position, dotted lines showing itsposition of disuse. Fig. 4 is a cross-sectional view showing the armapplied to a typ'ewriting machine. Fig. 5 is a detail cross-sectionalview, showing the means tending to rotate the roll-carrying rod.

A platen l is ournaled by an axle 2 in Sthc ends 3 of a platen framemounted on a 4 up and down to enable different types on carriage 41,said platen frame being shiftable the type bars 4 to strike the platen.The

usual front and rear pressure rolls 5 and 6 cooperate with the platen tofeed the sheets. A roll-carrying rod7 is firmly mounted in sleeves 7having grooved journals 7 turning in bearings 8 on'the ends 2} of theplaten frame, and extends across the latter. De-

pendingpressure roll-carrying arms 9 equipped with pressure rolls 10 areadjustable'along the rod, by the finger pieces 9 the rolls engaging thecards or other sheets at points adjacent the printing line,to hold'thesheets against the platen. The paper holding rolls 10 are held againstthe platen by springs 8 on the platen frame which tend to press therollS into the grooves 8 in the journals 7, and rotate the rod 7, theoperative positions of the parts being shown in Fig. 5. The rotation ofthe rod 7 is arrested by the engagement of the pressure rolls 10 -withthe platen, and consequently, the rod tends to bend or flex. Afinger-piece 11 on the rod enables the operator to throw off the rolls.An arm 12 is supported on the main carriage 4 and has a bearing 13fitting over the rod at a point intermediate its ends, said armoperating to support orstiifen the rod and prevent lateral springing -oryielding thereof. The arm 12 is hingedfas at 14, to

a bracket 15 fast on the carriage, and the bearing 13 is open at itslower end to permit the arm to be disengaged from the rod,'to

permit the adjustment of the pressure rollsalong the rod. The rod issufiiciently yielding to enable it to be sprung down to enter or escapefrom the slot 13. Said arm 12 is held in either operative or inoperativeposition by a spring 16, engaging .either of two faces of a knuckle 17on thearm, through which the pivot pin 14 passes. The bracket maybebraced against vertical. swinging of the rod 7, to enable the rod to beengageillbythe arm without undue strain. The re can, of course, turnfreely in the bearing in 3 the arm, which bearing is of sufficientlength i to .maintain its engagement with the rod when the latter isshiftedwiththe platen from full-line lower-case position to dottedlineupper-case positiomat Fig. 3; the walls of the slot being parallel andfitted-to the rod sufficiently closely for the purpose.

1,, fix

The invention is of especial value in extra "wide carriages, in whichthe rod 7 is so long in proportion to its diameter as to be relativelyweak.

The platen frame Slusually has a roll 20 to run upon a shift rail 21,the latter mounted upon the usual shift frame 22 pivoted at 23, wherebythe platen frame and platen are shifted up and down to enable differenttypes to print.

Variations may be resorted to Within the scope of the invention, andportions of the improvements may be used Without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combinae tion with a platen and apaper-feeding device including a tensioned rod extending across themachine and carrying pressure rolls to engage the platen, of an armconnected to the machine, and releasably engaging the rod intermediateits ends to support the latter.

In a typewriting machine, the combination with a platen and apaper-feeding dejice including a spring-pressed rod tending to rotate,said-rod extending across the machine and carrying pressure rollsadjustable along the rod to engage different widths of paper, of an armpivotally connected to the machine and releasably engaging the rod toprevent springing thereof and movable to a position of disuse to enablethe pressure rolls to be adjusted to either end of the rod.

In a typewriting machine, the combination with a shiftable platen frameand platen, and a paper-feeding device including a rod tensioned torotate, said rod extending across the platen frame and carrying pressurerolls to engage the platen, of an arm relative to which the plate hframe shifts, and having an elongated bearing, in which is fitted therod to accommodate the latter when the platen frame is shifted.

4'. In a typeu'riting machine, the combination With a platen frame andplaten, and a paper-feeding device, including a rod tensioned to rotate,said rod extending across the platen frame and carrying the pressurerolls to engage the platen, of an arm pivoted to the machine and havingarecess open at one end in Which the rod is loosely fitted.

5. In a typewriting machine, the combination with a shiftable platenframe and platen, and a paper-feeding device including a rod tensionedto rotate, said rod extending across the platen frame and carryingpressure rolls to engage the platen, of an arm having an elongatedbearing in which the rod is fitted, and a bracket to which the arm isattached, the bracket being secured to the machine independently of theplaten frame and having a brace engaging the machine to resist strainimparted by the rod to the arm] 6. In a typewriting machine, thecombination with a platen and a paper-feeding device including atensioned rod extending tion, and pressure rolls carried by the rod toengage the platen, of a stiffening member secured to' the machine andhaving a bearing in line with the rod supports to prevent the rod fromspringing under the strain.

8. .In a typewriting machine, the combination with a platen, a platenframe, paperfeeding mechanism including a rod extending across themachine and mounted in bearings on the platen frame. a spring tending torotate the rod in one direction, and pressure rolls carried by the rodto engage the platen and arrest the rotation of the rod, whereby saidrod is placed under tension, of a supporting member to releasably engagethe rod about midway of its ends to prevent tlexure thereof.

ALFRED G. F. KllROlVSKI.

\Vi tnesses K. l uannitnrr,

C. 'lllPLnY.

